Based on some of the properties of the root loci described thus far, the root loci of Eq. (F-24) are
sketched as shown in Fig. F-10 for K . It can be proven that the complex portion of the
root loci is a circle. The two breakaway points are on the real axis, one between 0 and 2 and the
other between 4 and . From Eq. (F-24), we have